X0306 4 2015-06-03 1 0001363829 Enstar Group LTD ESGR 0001442289 FIRST RESERVE FUND XII LP C/O FIRST RESERVE ONE LAFAYETTE PLACE GREENWICH CT 06830 1 0 0 0 0001442290 FR XII A PARALLEL VEHICLE LP C/O FIRST RESERVE ONE LAFAYETTE PLACE GREENWICH CT 06830 1 0 0 0 0001604482 FR XI Offshore AIV, L.P. C/O FIRST RESERVE ONE LAFAYETTE PLACE GREENWICH CT 06830 1 0 0 0 0001604479 FR Torus Co-Investment, L.P. C/O FIRST RESERVE ONE LAFAYETTE PLACE GREENWICH CT 06830 1 0 0 0 0001544731 First Reserve GP XII Ltd C/O FIRST RESERVE ONE LAFAYETTE PLACE GREENWICH CT 06830 1 0 0 0 0001544730 First Reserve GP XII, LP C/O FIRST RESERVE ONE LAFAYETTE PLACE GREENWICH CT 06830 1 0 0 0 0001597224 FR XI Offshore GP, L.P. C/O FIRST RESERVE ONE LAFAYETTE PLACE GREENWICH CT 06830 1 0 0 0 0001597223 FR XI Offshore GP Ltd C/O FIRST RESERVE ONE LAFAYETTE PLACE GREENWICH CT 06830 1 0 0 0 0000908428 MACAULAY WILLIAM E C/O FIRST RESERVE ONE LAFAYETTE PLACE GREENWICH CT 06830 1 0 0 0 Ordinary Stock, par value $1.00/share ("Ordinary Shares") 2015-06-03 4 S 0 652596 140 D 0 I See Footnote Ordinary Stock 2015-06-03 4 S 0 11715 140 D 0 I See Footnote Ordinary Stock 2015-06-03 4 S 0 809989 140 D 0 I See Footnote Ordinary Stock 2015-06-03 4 S 0 26911 140 D 0 I See Footnote Represents Ordinary Shares held directly by First Reserve Fund XII, L.P. ("First Reserve XII"). Represents Ordinary Shares held directly by FR XII-A Parallel Vehicle L.P., ("FR XII-A"). Represents Ordinary Shares held directly by FR XI Offshore AIV, L.P. ("FR XI Offshore AIV"). Represents Ordinary Shares held directly by FR Torus Co-Investment, L.P ("FR Co-Invest," together with First Reserve XII, FR XII-A and FR XI Offshore AIV, the "First Reserve Vehicles"). First Reserve GP XII Limited ("XII Limited") is the general partner of First Reserve GP XII, L.P. ("XII GP"), which in turn is the general partner of each of First Reserve XII and FR XII-A. XII Limited is the general partner of FR Co-Invest. William E. Macaulay is a director of XII Limited, and has the right to appoint a majority of the Board of Directors of XII Limited. By virtue of Mr. Macaulay's right to appoint a majority of the directors of XII Limited, Mr. Macaulay may be deemed to have the shared power to vote or direct the vote of (and the shared power to dispose of or direct the disposition of) the Ordinary Shares held by each of First Reserve XII, FR XII-A and FR Co-Invest and therefore, Mr. Macaulay may be deemed to be a beneficial owner of such Ordinary Shares. FR XI Offshore GP, L.P. ("GP XI Offshore") is the general partner of FR XI Offshore AIV. FR XI Offshore GP Limited ("GP XI Offshore Limited", together with the First Reserve Vehicles, XII Limited, XII GP, GP XI Offshore and Mr. Macaulay, collectively the "Reporting Persons") is the general partner of GP XI Offshore. Each of such Reporting Persons may be deemed to beneficially own the Ordinary Shares beneficially owned by the First Reserve Vehicles directly or indirectly controlled by it, but each of the Reporting Persons, other than the First Reserve Vehicles as to their direct holdings of such Ordinary Shares, disclaims beneficial ownership of the Ordinary Shares held by the First Reserve Vehicles except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons, other than the First Reserve Vehicles as to their direct holdings of Ordinary Shares, states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 of the Securities Exchange Act of 1934 or for any other purpose. FIRST RESERVE FUND XII, L.P., BY: FIRST RESERVE GP XII, L.P., its general partner, BY: FIRST RESERVE GP XII LIMITED, its general partner, By: /s/ Anne E. Gold, Chief Compliance Officer, Secretary 2015-06-04 FR XII-A PARALLEL VEHICLE, L.P., BY: FIRST RESERVE GP XII, L.P., its general partner, BY: FIRST RESERVE GP XII LIMITED, its general partner, By: /s/ Anne E. Gold, Chief Compliance Officer, Secretary 2015-06-04 FR XI OFFSHORE AIV, L.P., BY: FR XI OFFSHORE GP, L.P., its general partner, BY: FR XI OFFSHORE GP LIMITED, its general partner, By: /s/ Anne E. Gold, Chief Compliance Officer, Secretary 2015-06-04 FR TORUS CO-INVESTMENT, L.P., BY: FIRST RESERVE GP XII LIMITED, its general partner, By: /s/ Anne E. Gold, Chief Compliance Officer, Secretary 2015-06-04 FIRST RESERVE GP XII LIMITED, By: /s/ Anne E. Gold, Chief Compliance Officer, Secretary 2015-06-04 FIRST RESERVE GP XII, L.P., BY: FIRST RESERVE GP XII LIMITED, its general partner, By: /s/ Anne E. Gold, Chief Compliance Officer, Secretary 2015-06-04 FR XI OFFSHORE GP, L.P., BY: FR XI OFFSHORE GP LIMITED, its general partner, By: /s/ Anne E. Gold, Chief Compliance Officer, Secretary 2015-06-04 FR XI OFFSHORE GP LIMITED, By: /s/ Anne E. Gold, Chief Compliance Officer, Secretary 2015-06-04 WILLIAM E. MACAULAY, By: /s/ Anne E. Gold, Attorney-in-fact 2015-06-04